E.S.
We took our 10 month old to the beach a couple of years ago and he had a blast! I would definitely take a pack 'n play for him to sleep in, and most definitely take beach toys. I would also recommend Desitin or Balmex because you may find that he eats enough sand to poop out a sandcastle and that can be a little harsh on the bottom. I also loved the spray sunscreen because when they get covered in sand it's hard to spread lotion on them. I wouldn't try to bring anything that's not essential, like a portable high chair or swing because it's a short trip. I held my son on my lap while we ate or kept him in the car seat carrier. One last thing that I just remembered was a beach umbrella or better yet, a sun tent. We ordered one from One Step Ahead and used it whenever he seemed a little fussy or on the rare occasion that he fell asleep. It's also a nice place to put a food and beverage cooler. Have fun at the beach!